Wall heater cover



FIG. 1 is a front perspective view of a wall heater cover, showing my new design;

FIG. 2 is a bottom plan view thereof;

FIG. 3 is a side elevation view thereof, the opposite side being a mirror image of that shown; and

FIG. 4 is a front elevation view thereof. 

The ornamental design for a wall heater cover, as shown and described. 